Resinous composition



Patented May 12, 1936 UNITED STATES PATENT OFFICE 2,040,687 RESIN OUS COMPOSITION Stanley Ernest Chubb,

, assignor to B k England, a British corporation No Drawing.

Serial No. 643,124. 18, 1931 Application .In Great Britain November November 17, 1932,

1 Claim. (Cl. 10622) e resinous prod uct without a hardening agent.

It is sometimes desirable to produce moulded articles with increased flexibilit for instance Phenol-acetaldehyde resin Tung oil Phenol-acetaldehyde resin 500 oil Linseed 200 C. for 25 minutes resulting in a clear, hard may be added if desired. This mixture, when resin which may be incorporated with fibrous masubjected to the action of heat and pressure,

terial (together with hardeners, lubricants, gives moulded articles possessing marked flexicolouring matter, etc.) to give mouldable combility.

5 positions or may be dissolved in suitable solvents lhe fibrous filler, instead of being in the loose 5 as in the previous example. form, such as wood meal, paper pulp, asbestos fibres, may be used in sheet form as paper, woven textile fabric, sheet asbestos, etc. In such cases Example No. 3

Parts by welghg the binder is preferably employed in solution as,

gggg fig a 2: for instance, in a mixture of benzol and alcohol. 10 Tung on 300 The sheet fibrous material is impregnated wi h Hy 5555 2 ga -g 10 the resin solution, the solvents being subsequently dried ed. The impregnated sheet may be The mixture is boiled under a reflux condenser heat-hardened or a number of sheets superimfor 3-4 hours and then heated up to 200 C. for posed and the stack subjected to the combined 15 one hour in an open pan, when the product takes action of heat and pressure. The laminated stock the form of a clear hard resin. resulting is again characterized by superior flexibility.

Instead of condensation products of phenol and acetaldehyde, resins may be used made from any Example N0. 4

Parts by weight 500 other phenol condensed with aceta ldehyde or its Phenol-acetaldehyde resin Tung oil 200 lymers. Linseed or other fatty oil may be sub- The mixture is heated to 200 C. Complete solustituted for the tung oil given in the examples. tion is efiected in about one hour but heating is I claim: continued until a sample on cooling is clear, hard Process for p pa n a mp s ti n m ldabl 2 and britt1 under the action of heat and pressure into an infusible article characterized by flexibility which comprises heating a phenol-acetaldehyde condensation product with a fatty oil until the viscous liquid first formed becomes clear andbrittle The resinous material is then incorporated with a fibrous filling material and a methylene 30 containing agent such as hexamethylenetetramine.

Parts by weight on cooling and mixing the resinous product so Resin (made as described above) 100 formed with a filler and a hardening agent for Wood meal no reacting with the resinous product when sub- Hexamethylenetetramine 8.6 to the acmon of heat m moldlng opera- 35 Lubricants, colouring matter, plasticizers, etc. STANLEY ERNEST CHUBB. 

